{"id":1891,"date":"2025-12-25T19:18:21","date_gmt":"2025-12-25T18:18:21","guid":{"rendered":"https:\/\/www.laboratoireslelegard.com\/?post_type=product&#038;p=1891"},"modified":"2025-12-25T19:23:14","modified_gmt":"2025-12-25T18:23:14","slug":"stability-test","status":"publish","type":"product","link":"https:\/\/www.laboratoireslelegard.com\/en\/product\/stability-test\/","title":{"rendered":"Stability test"},"content":{"rendered":"<div data-elementor-type=\"product-post\" data-elementor-id=\"1891\" class=\"elementor elementor-1891\" data-elementor-post-type=\"product\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-06bf5d0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"06bf5d0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6f2a6e1\" data-id=\"6f2a6e1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7d75f8c elementor-widget elementor-widget-text-editor\" data-id=\"7d75f8c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"w-full\"><div class=\"progressive-markdown-content\"><div class=\"w-full\"><div class=\"progressive-markdown-content\"><div class=\"content-visibility-auto\"><div class=\"content-visibility-auto\"><p>The <strong>stability test<\/strong> is essential to ensure that a cosmetic product retains its physicochemical properties, appearance, and safety throughout its shelf life. The formula is subjected to strictly controlled environmental conditions: temperature variations (cold, heat, thermal cycles), exposure to light (UV and visible light), relative humidity, and mechanical stress (agitation, vibrations). These stresses reproduce real-life situations encountered during transport, storage, or daily use, and allow us to verify that the product does not undergo any degradation or alteration in its performance.<\/p><\/div><div class=\"content-visibility-auto\"><p>Two complementary approaches are generally used:<\/p><\/div><div class=\"content-visibility-auto\"><ul><li><strong>Accelerated stability<\/strong> \u2013 carried out over approximately three months, it uses high temperatures (often 40\u00b0C \u00b1 2\u00b0C) and light\/intensity cycles to simulate rapid aging. This method predicts long-term behavior, helps to choose the optimal packaging, and establish the minimum shelf life (MSL) date printed on the label.<\/li><\/ul><\/div><div class=\"content-visibility-auto\"><ul><li><strong>Stability in real-world conditions<\/strong> \u2013 Conducted over a period of up to three years, it keeps the product at temperatures and humidity levels similar to those encountered at points of sale and in consumers' homes. It confirms the results of the accelerated test and validates the final shelf life.<\/li><\/ul><\/div><div class=\"content-visibility-auto\"><p>During testing, a range of parameters are measured at regular intervals: color, visual appearance, odor, pH, viscosity, density, volume, packaging integrity (leaks, cap deterioration), and any functional characteristics specific to the formula (UV filter effectiveness, antioxidant activity, active ingredient release). Any anomalies\u2014phase separation, oxidation, loss of efficacy, or sensory alteration\u2014are recorded and analyzed.<\/p><\/div><div class=\"content-visibility-auto\"><p>Compliance with these requirements is mandatory for the constitution of the <strong>DIP\/PIF<\/strong> (Product Information File) and to meet the requirements of the\u2019<strong>Swiss Ordinance on Cosmetics (OCos\/OSAV)<\/strong> as well as the <strong>Regulation (EC) No. 1223\/2009<\/strong>. By ensuring that the product remains stable, safe, and compliant throughout its shelf life, stability testing is a crucial step in bringing cosmetics to market in Switzerland and Europe.<\/p><\/div><br \/><hr \/><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Le test de stabilit\u00e9 est indispensable pour s\u2019assurer qu\u2019un produit cosm\u00e9tique conserve ses propri\u00e9t\u00e9s physico\u2011chimiques, son apparence et sa s\u00e9curit\u00e9 tout au long de sa dur\u00e9e de vie. La formule est soumise \u00e0 des conditions environnementales strictement contr\u00f4l\u00e9es\u202f: variations de temp\u00e9rature (froid, chaleur, cycles thermiques), exposition \u00e0 la lumi\u00e8re (UV et lumi\u00e8re visible), humidit\u00e9 relative [&hellip;]<\/p>","protected":false},"featured_media":1743,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[151],"product_tag":[113,116,112,114,115,117],"class_list":["post-1891","product","type-product","status-publish","has-post-thumbnail","product_cat-analyse","product_tag-activite","product_tag-activity","product_tag-analyse","product_tag-eau","product_tag-micro-organismes","product_tag-water","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Test de stabilit\u00e9<\/title>\n<meta name=\"description\" content=\"Test de stabilit\u00e9\u202f: garantit la conformit\u00e9, la s\u00e9curit\u00e9 et la dur\u00e9e de vie du cosm\u00e9tique, essentiel pour la mise sur le march\u00e9 europ\u00e9en et suisse.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.laboratoireslelegard.com\/en\/product\/stability-test\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Test de stabilit\u00e9\" \/>\n<meta property=\"og:description\" content=\"Test de stabilit\u00e9\u202f: garantit la conformit\u00e9, la s\u00e9curit\u00e9 et la dur\u00e9e de vie du cosm\u00e9tique, essentiel pour la mise sur le march\u00e9 europ\u00e9en et suisse.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.laboratoireslelegard.com\/en\/product\/stability-test\/\" \/>\n<meta property=\"og:site_name\" content=\"Laboratoires Lel\u00e9gard\" \/>\n<meta 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